Another trope that usually annoys me in some science-fiction works, and to a lesser extent other forms of fiction:
All humans have to be shorter than other alien races with enhanced physicality. For example, they did cast the Big Show and Dwayne Johnson as other alien races to dwarf the human main cast, but not once did they ever pull a gigantic human that is just a plain and ordinary human vs your typical stronger-than-your-average-human alien like a Klingon. Not once have I ever seen a very human Big Show vs something like a Reptilian Xindi...to show that just plain ordinary humans can play on an even field with other alien races when it comes to physicality.
Once, just once, would I have enjoyed watching a scene where a Jurassic Park velociraptor leaps at a human victim...only for a big, meaty human hand to reach from out of nowhere, clutch down on the velociraptor's throat, essentially intercepting the velociraptor and preventing it from completing the pounce attack. As the camera pans over to reveal who this physically imposing savior is, it turns out to be a scowling giant of a man who could either be a Big Show, Glen Jacobs, Nathan Jones or a Mark Calloway (Undertaker), staring the proverbial hole into the velociraptor's eyes, and proceeds to either choke-slam the raptor into the ground, choke-launch the raptor a good distance away, or to set the raptor up for a devastating haymaker that clean knocks it the eff out. Just once would I have liked to see something like that.